Here are a
list of things that you can do to make your life a lot easier.

Egg
trick: Whenever you see an egg plant on the screen, do a
little butt slam and it will either spit the eggs faster or spit
out four at a time. Handy if you are in a rush.

Ptooie
Pokey and Giant Daisy: Whenever one of these is on your
screen then butt slam on the ground and they will be knocked out.
You can make it past easily then.

Find
glob: He is found on Sluggy the Unshaven's Fort. make
your way up the first flight of stairs, when you reach the next
bunch of clouds with stairs in them then shoot the first one. It
will release a small staircase. Now climb to the top and leap to
the left. You should make it onto another ledge, make it across
this section and you should reach a pipe. From here you have two
options. Go right for points or go left to find Glob.

The
map screen cheat: On the map screen, hold down select
and press X,X,Y,B,A. You get a screen where you can choose some
bonus levels. Some of them are two player as well. Using this
cheat allows you to stock up on items.